根据句意，用括号内所给动词的适当形式填空。
What __________(make) your friend so special?
The students are looking forward to       (have) a holiday. They are just too busy these days.
— Why did you choose __________(sit) in the front of the coach?
— Because I often feel sick on the coach.
The earthquake started while I ____________(do) some shopping.
I hope you ___________ (not forget) to clean the blackboard next time.